The apartment is really cheap for Bangkok. But this has a reason. Location isn't great. It's at the end of a jungle of nearrow streets. You have to walk at least 15 minutes to get out and then you are still in an area where the restaurants don't have english menues. It's really aithentic Thai style.
The apartment itself is ok. Very clean, bed could be more comfortable (very hard mattress) and the bathroom is a bit worn out. But compared to the price it's totally ok. I booked it because it's reachable via MRT amd it'snot too far away from Emma Motorbike Rental where I rented a scooter to explore Thailand. For a short stay it is ok, but I wouldn't stay longer than 2 nights.
Communication with Ken was good and check in very easy. Arriving late is no problem.